I'm sorry you're going through such tough times with your T. I also wonder if her illness has something to do with the way she is acting, but that's not an excuse for being inconsistent about the email situation or for snapping at you.

I would suggest telling her that you feel unsafe and confused by her actions. All of your reasons are valid, and you two need to discuss it until you've come to a mutual understanding.

I hope the 2 weeks goes quickly for you. I know how crummy it feels when T-problems are unresolved and you have that unsettled feeling.